Hello,
The headache seems unrelated to your cyst and can be due to tension headache. For the same, you can take some over the counter NSAID analgesic(pain reliever) like ibuprofen(advil/motrin) or acetaminophen after consulting your doctor. Also go to sleep and wake up at the same time.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.